ruamel.yaml
===========

``ruamel.yaml`` is a YAML 1.2 loader/dumper package for Python.

* `Overview <http://yaml.readthedocs.org/en/latest/overview.html>`_
* `Installing <http://yaml.readthedocs.org/en/latest/install.html>`_
* `Details <http://yaml.readthedocs.org/en/latest/detail.html>`_
* `Examples <http://yaml.readthedocs.org/en/latest/example.html>`_
* `Differences with PyYAML <http://yaml.readthedocs.org/en/latest/pyyaml.html>`_

.. image:: https://readthedocs.org/projects/yaml/badge/?version=stable
   :target: https://yaml.readthedocs.org/en/stable

ChangeLog
=========

.. should insert NEXT: at the beginning of line for next key

0.13.5 (2016-12-25):
  - fix for issue 84, deepcopy not properly workin (reported by Peter Amstutz)

0.13.4 (2016-12-05):
  - another fix for issue 82, change to non-global resolver data broke implicit type
    specification

0.13.3 (2016-12-05):
  - fix for issue 82, deepcopy not working (reported by code monk)

0.13.2 (2016-11-28):
  - fix for comments after empty (null) values  (reported by dsw2127 and cokelaer)

0.13.1 (2016-11-22):
  - optimisations on memory usage when loading YAML from large files (py3: -50%, py2: -85%)

0.13.0 (2016-11-20):
  - if ``load()`` or ``load_all()`` is called with only a single argument
    (stream or string)
    a UnsafeLoaderWarning will be issued once. If appropriate you can surpress this
    warning by filtering it. Explicitly supplying the ``Loader=ruamel.yaml.Loader``
    argument, will also prevent it from being issued. You should however consider
    using ``safe_load()``, ``safe_load_all()`` if your YAML input does not use tags.
  - allow adding comments before and after keys (based on
    `StackOveflow Q&A <http://stackoverflow.com/a/40705671/1307905>`_  by
    `msinn <http://stackoverflow.com/users/7185467/msinn>`_)

0.12.18 (2016-11-16):
  - another fix for numpy (re-reported independently by PaulG & Nathanial Burdic)

0.12.17 (2016-11-15):
  - only the RoundTripLoader included the Resolver that supports YAML 1.2
    now all loaders do (reported by mixmastamyk)

0.12.16 (2016-11-13):
  - allow dot char (and many others) in anchor name
    Fix issue 72 (reported by Shalon Wood)
  - Slightly smarter behaviour dumping strings when no style is
    specified. Single string scalars that start with single quotes
    or have newlines now are dumped double quoted: "'abc\nklm'" instead of::

      '''abc

        klm'''

0.12.14 (2016-09-21):
 - preserve round-trip sequences that are mapping keys
   (prompted by stackoverflow question 39595807 from Nowox)

0.12.13 (2016-09-15):
 - Fix for issue #60 representation of CommentedMap with merge
   keys incorrect (reported by Tal Liron)

0.12.11 (2016-09-06):
 - Fix issue 58 endless loop in scanning tokens (reported by
   Christopher Lambert)

0.12.10 (2016-09-05):
 - Make previous fix depend on unicode char width (32 bit unicode support
   is a problem on MacOS reported by David Tagatac)

0.12.8 (2016-09-05):
   - To be ignored Unicode characters were not properly regex matched
     (no specific tests, PR by Haraguroicha Hsu)

0.12.7 (2016-09-03):
   - fixing issue 54 empty lines with spaces (reported by Alex Harvey)

0.12.6 (2016-09-03):
   - fixing issue 46 empty lines between top-level keys were gobbled (but
     not between sequence elements, nor between keys in netsted mappings
     (reported by Alex Harvey)

0.12.5 (2016-08-20):
  - fixing issue 45 preserving datetime formatting (submitted by altuin)
    Several formatting parameters are preserved with some normalisation:
  - preserve 'T', 't' is replaced by 'T', multiple spaces between date
    and time reduced to one.
  - optional space before timezone is removed
  - still using microseconds, but now rounded (.1234567 -> .123457)
  - Z/-5/+01:00 preserved

0.12.4 (2016-08-19):
  - Fix for issue 44: missing preserve_quotes keyword argument (reported
    by M. Crusoe)

0.12.3 (2016-08-17):
  - correct 'in' operation for merged CommentedMaps in round-trip mode
    (implementation inspired by J.Ngo, but original not working for merges)
  - iteration over round-trip loaded mappings, that contain merges. Also
    keys(), items(), values() (Py3/Py2) and iterkeys(), iteritems(),
    itervalues(), viewkeys(), viewitems(), viewvalues() (Py2)
  - reuse of anchor name now generates warning, not an error. Round-tripping such
    anchors works correctly. This inherited PyYAML issue was brought to attention
    by G. Coddut (and was long standing https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=515634)
    suppressing the warning::

        import warnings
        from ruamel.yaml.error import ReusedAnchorWarning
        warnings.simplefilter("ignore", ReusedAnchorWarning)

0.12.2 (2016-08-16):
  - minor improvements based on feedback from M. Crusoe
    https://bitbucket.org/ruamel/yaml/issues/42/

0.12.0 (2016-08-16):
  - drop support for Python 2.6
  - include initial Type information (inspired by M. Crusoe)

0.11.15 (2016-08-07):
  - Change to prevent FutureWarning in NumPy, as reported by tgehring
    ("comparison to None will result in an elementwise object comparison in the future")

0.11.14 (2016-07-06):
  - fix preserve_quotes missing on original Loaders (as reported
    by Leynos, bitbucket issue 38)

0.11.13 (2016-07-06):
  - documentation only, automated linux wheels

0.11.12 (2016-07-06):
  - added support for roundtrip of single/double quoted scalars using:
    ruamel.yaml.round_trip_load(stream, preserve_quotes=True)

0.11.0 (2016-02-18):
  - RoundTripLoader loads 1.2 by default (no sexagesimals, 012 octals nor
    yes/no/on/off booleans